Skip to Content

Menu

Search

(616) 772-9551

Account
Cart

Shop By Category Show Shop By Category Subpages
- Back to Main Menu
- Shop By Category
- Air Intake Show Air Intake Subpages
  - Back to Shop By Category
  - Air Intake
  - Cold Air Intakes
  - Intake Sensors and Electrical
  - Parts and Accessories
  - Replacement Filters
- Axle and Differential Show Axle and Differential Subpages
  - Back to Shop By Category
  - Axle and Differential
  - Front Axle
  - Gear Lubes and Additives
  - Rear Axle
- Brakes and Braking Systems Show Brakes and Braking Systems Subpages
  - Back to Shop By Category
  - Brakes and Braking Systems
  - Anti-Lock System
  - Calipers
  - Drums and Rotors
  - Hoses Lines Hardware Kits and Fluids
  - Master Cylinders and Power Assist
  - Pads and Shoes
  - Performance Brake Kits
- Cooling System Show Cooling System Subpages
  - Back to Shop By Category
  - Cooling System
  - Fans
  - Hardware
  - Hoses
  - Gaskets Seals and O-Rings
  - Radiators and Tanks
  - Sensors and Electrical
  - Thermostats
  - Water Pumps
- Engine Show Engine Subpages
  - Back to Shop By Category
  - Engine
  - Belts Tensioners and Pulleys
  - Bolts Studs and Fasteners
  - Components
  - Crate Engines
  - Cylinder Head and Valve Train
  - Engine Gasket Kits
  - Engine Gaskets and Seals
  - Glow Plugs and Related
  - Motor Mounts
  - Oil System
  - Rotating Assembly
  - Sensors and Electrical
  - Starting and Charging
- Emission Components Show Emission Components Subpages
  - Back to Shop By Category
  - Emission Components
  - Catalytic Converter
  - DEF System
  - DPF
  - EGR System
  - Sensors and Electrical
- Exhaust Show Exhaust Subpages
  - Back to Shop By Category
  - Exhaust
  - Clamps Hardware and Hangers
  - Exhaust Systems
  - Exhaust Tips
  - Manifolds Uppipes and Downpipes
  - Mufflers
- Exterior and Body Show Exterior and Body Subpages
  - Back to Shop By Category
  - Exterior and Body
  - Body Mounts
  - Door and Windows
  - Emblems and Badges
  - Hinges
  - Mirrors
  - Mud Flaps
  - Tailgate
  - Winter Grill Cover
- Fuel System Show Fuel System Subpages
  - Back to Shop By Category
  - Fuel System
  - Conversion Kits
  - Disaster Kits
  - Fuel Injectors
  - Fuel Lines and Rails
  - Fuel Tanks and Related
  - Gaskets-Seals-and O-Rings
  - Hardware and Installation
  - Injection Pumps and Regulators
  - Lift Pumps and Sumps
  - Rebuild Kits
  - Replacement Filters
  - Sensors and Electrical
  - Tools
- Heating and Air Conditioning Show Heating and Air Conditioning Subpages
  - Back to Shop By Category
  - Heating and Air Conditioning
  - Air Conditioning
  - Heating
  - HVAC Sensors and Electrical
- Filters Fluids and Grease Show Filters Fluids and Grease Subpages
  - Back to Shop By Category
  - Filters Fluids and Grease
  - Analysis Kits
  - Filters
  - Fluids
- Interior and Trim Show Interior and Trim Subpages
  - Back to Shop By Category
  - Interior and Trim
  - Replacement Trim
  - Seating
- Lighting
- Performance Show Performance Subpages
  - Back to Shop By Category
  - Performance
  - Tuning and Monitors
- Steering and Suspension Show Steering and Suspension Subpages
  - Back to Shop By Category
  - Steering and Suspension
  - Airbags and Accessories
  - Ball Joints
  - CV Shafts
  - Hardware
  - Helper Springs
  - Leaf Springs and Rear Suspension
  - Leveling Kits
  - Lift Kits
  - Power Steering
  - Shocks
  - Steering Components and Upgrades
  - Sulastic Shackles
  - Upper Control Arm Kits
  - Wheel Bearings
  - Wheel Spacers and Adapters
- Merch
- Tools
- Towing Show Towing Subpages
  - Back to Shop By Category
  - Towing
  - Wiring
- Transfer Case Show Transfer Case Subpages
  - Back to Shop By Category
  - Transfer Case
  - Bearings & Seals
  - Complete Unit
  - Gas Transfer Case
  - Pump Upgrade Kit
  - Rebuild Kits
  - Replacement Parts
  - Switches and Sensors
  - Tools
- Transmissions Show Transmissions Subpages
  - Back to Shop By Category
  - Transmissions
  - Bearings and Bushings
  - Seals
  - Clutch Kits
  - Electrical and Modules
  - Gasket Kits
  - Hard Parts
  - Mounts and Crossmembers
  - Pro Series Transmissions
  - Rear Housing Supports
  - Shifters
  - Torque Converters
  - Transmission Coolers and Lines
  - Transmission Filters Fluids and Pans
  - Transmission Upgrade Parts
  - Valve Body
  - Work Series Transmissions
- Turbo and Intercooling Show Turbo and Intercooling Subpages
  - Back to Shop By Category
  - Turbo and Intercooling
  - Blankets and Heat Control
  - Clamps and Hardware
  - Downpipes
  - Gaskets and Misc
  - Inlet and Mouthpieces
  - Intercooler Pipes
  - Intercoolers
  - Oil Lines
  - Sensors and Electrical
  - Turbochargers
  - Wheels
Services
Shop By Brand
Tech Info
Blog
Connect with Us!

Home
Shop By Category
Emission Components
Catalytic Converter

Catalytic Converter

: Option 1 Option 2 Option 3 Option 4
: Option 1 Option 2 Option 3 Option 4
: Option 1 Option 2 Option 3 Option 4
: Option 1 Option 2 Option 3 Option 4

There are no products listed under this category.

Duramax & Allison Experts In Your Inbox

EXCLUSIVE SAVINGS AND HELPFUL ARTICLES! Join our tribe of Duramax and Allison transmission fans and get our latest deals, articles, and resources sent straight to your inbox!

Connect With Us

Contact Us

support@merchant-automotive.com

8:00 am - 5:00 pm | M-F Eastern Standard Time
286 Hedcor St. Holland, MI 49423

Connect With Us

: About Us

Our History

Our Values

Become a Dealer

Services (Zeeland, MI)

Help & FAQs

Instruction Manuals
: Online Return Policy

Shipping Policy

Warranty Form

Privacy Policy

Core Return Policy

Military Discount

© 2026 Merchant Automotive. All rights reserved.